WATER-SOLUBLE, ENVIRONMENTALLY-FRIENDLY, SELF-ADHESIVE INSULATING COATING FOR SILICON STEEL

• Main Authors: XIAO, Pan, WANG, Bo, LI, Dengfeng, XIE, Shishu, GUO, Jianguo, SHEN, Kejin, LI, Guobao
• Format: Patent
• Language: English; French; German
• Published: 27.01.2021
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

The present disclosure provides a water-soluble, environment-friendly, self-bonding insulating coating material for silicon steel, comprising a thermosetting aqueous film-forming resin, a thermoplastic aqueous film-forming resin, inorganic nanoparticles, auxiliary agent, solvent and pure water. the solid weight of the thermosetting aqueous film-forming resin accounts for 0.1-50% of the total weight of the coating material, the solid weight of the thermoplastic aqueous film-forming resin accounts for 0.1-60% of the total weight of the coating material, the solid weight of the inorganic nanoparticles accounts for 0.1-10% of the total weight of the coating material, the weight of auxiliary agent and solvent accounts for 5-25% of the total weight of the coating material. The coating material can produce a thin, sticky, insulation, none-edge-overflow self-bonding coating product. During second curing molding of a laminated iron core, excessive pressure and temperature are not required, thereby shortening the curing time, and increasing the iron core processing efficiency.